God wants everyone to be firmly established in sound doctrine. The more time an individual spends in his Bible, the better grounded in truth he becomes. With the importance placed upon establishing believers, God warned about being “carried about with divers and strange doctrines” (Hebrews 13:9) and about being “tossed to and fro, and carried about with every wind of doctrine” (Ephesians 4:14). The Devil hates Christians who become rooted and grounded in the truth. This is why he weakens and destroys believers by propagating doctrines contrary to scripture. Men may be the facilitators of false doctrines but the ultimate plan of deception is crafted by the Devil himself.
The psalmist proclaims: “Behold, how good and how pleasant it is for brethren to dwell together in unity!” Unlike the unity of unbelievers and the heathen, the Lord rejoices in the righteous unity of His people. King David was someone who knew and experienced the difficulties of division. He spent a great deal of his life running from a king and those who were against him. Even in the beginning of his reign, the people were divided (2 Samuel 2:8-11). It was not until 7 1/2 years later that the people were united in David (2 Samuel 5:1-5). When the people dwelt in unity, David rejoiced. He likened it to the source of spiritual life for the nation of Israel, the priesthood (Psalm 133:2), and to the source of physical life in the dew of Hermon (Psalm 133:3). In other words, the right kind of unity gave life and hope to the nation!